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<h1>PI</h1>
<p>PI 函数得出 π (pi)（圆的圆周与其直径的比）的近似值。</p>
<div class="HIStrings"><p><strong class="Term">PI</strong>()</p></div>
<div id="ffa59011f5" class="Subhead"><h2 class="Name">注释</h2>
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        <li><p>PI 函数无任何参数。但是，它必须包括圆括号。</p></li>
        <li><p>PI 函数精确到 15 个小数位。</p></li>
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        <th scope="col"><p class="TableHead">示例</p></th>
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        <td><p>=PI() 得出近似值 3.14159265358979。</p>
            <p>=SIN(PI()/2) 得出 1（π/2 弧度或 90 度的正弦值）。</p></td>
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<div class="LinkUniversal"><strong>另请参阅</strong><a href="ffa5910f52.html#ffa5910f52" class="xRef AppleTopic">SQRTPI</a>
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